HCD-GPX33, HCD-GPX55, HCD-GPX77, HCD-GPX88 - Sony Audio Service Manual (repair manual). Page 14

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HCD-GPX33/GPX55/GPX77/GPX88
14
[USER RESET]
The user reset clears all data including preset data stored in the data 
fl ash to initial conditions exclude history mode data.
Procedure:
1. Press 
[
\/1
 / STANDBY] button to turn on the system.
2. Press [] and [LED COLOR] button simultaneously for 3 
seconds.
3.  “RESET” appears on the fl uorescent indicator tube. After that, 
the fl uorescent indicator tube becomes blank for a while, and 
the system is reset.
[COLD RESET]
The cold reset clears all data including preset data stored in the 
data fl ash to initial conditions included history mode data. Execute 
this mode when returning the set to the customer.
Procedure:
1. Press 
[
\/1
 / STANDBY] button to turn on the system.
2. Press [] and [AUDIO IN] button simultaneously for 3 
seconds.
3.  “COLD RESET” appears on the fl uorescent indicator tube. 
After that, the fl uorescent indicator tube becomes blank for a 
while, and the system is reset.
[CD SHIP MODE (WITH MEMORY CLEAR)]
This mode moves the optical pick-up to the position durable to 
vibration and clears all data including preset data stored in the data 
fl ash to initial conditions during the next AC-In. Use this mode 
when returning the set to the customer after repair.
Procedure:
1. Press 
[
\/1
 / STANDBY] button to turn on the system.
2.  Select CD function.
3.  Press [CD] and [SOUND FLASH] button simultaneously for 3 
seconds. The system turns off automatically.
4.  “MECHA LOCK” is displayed on the fl uorescent  indicator 
tube and the CD ship mode is set.
[CD TRAY LOCK MODE]
This mode let you lock the disc tray. When this mode is activated,
the disc tray will not open when [Z OPEN/CLOSE] button is
pressed. The message “LOCKED” will be displayed on the fl uo-
rescent indicator tube. This mode only applied when there is disc 
on the tray.
Procedure:
1. Press 
[
\/1
 / STANDBY] button to turn on the system.
2.  Select CD function.
3. Press 
[] and [ENTER] button simultaneously and hold down 
until “LOCKED” or “UNLOCKED” displayed on the fl uores-
cent indicator tube (around 5 seconds).
[CDM AGING MODE]
This mode is used for CDM aging.
Procedure:
1. Press 
[
\/1
 / STANDBY] button to turn on the system.
2.  Select CD function.
3.  Open the disc tray, insert a disc and close the tray.
4.  Press [CD] and [BASS BAZUCA] button simultaneously for 3 
seconds.
5. The fl uorescent indicator tube displays Aging Display 
“AG xxxx/yyyy”.
 
 
“xxxx” represents the error counter
 
 
(Maximum Value of “xxxx” = 9999)
 
 
“yyyy” represents the cycle counter
 
 
(Maximum Value of “yyyy” = 9999)
6. Press 
[+ / 
] or [- / ]  to search for Aging History Error 
Display
   The 
fl uorescent indicator tube displays “Mx E1E2E3E4”. 
 
 
x: error history number
 
 
E1: Loading sequence JCP high
 
 
E2: Loading sequence JCP low
 
 
E3: Loading operation JCP
 
 
E4: Cam position operation JCP
7.  Press [ENTER] to Aging Display
To release from this mode, press [
\/1
 / STANDBY] button.
[HISTORY MODE]
This mode is used to check important data stored in the system 
when PROTECTOR happen.
Procedure:
1.  During demo mode, press [ENTER] and [LED PATTERN] for 
5 seconds to mode in to history mode.
2.  Press the [
 .m / TUNING-] or [M > 
/ TUNING+]
button to check history data stored.
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